K4B4G1646Q View Datasheet(PDF) - Samsung
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Description
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K4B4G1646Q Datasheet PDF : 65 Pages
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K4B4G1646Q
datasheet
Preliminary Rev. 0.5
DDR3L SDRAM
8. AC & DC Input Measurement Levels
8.1 AC & DC Logic input levels for single-ended signals
[ Table 7 ] Single-ended AC & DC input levels for Command and Address(1.35V)
Symbol
Parameter
DDR3L-800/1066/1333/1600
Min.
Max.
Unit
NOTE
1.35V
VIH.CA(DC90)
DC input logic high
VREF + 90
VDD
mV
1
VIL.CA(DC90)
DC input logic low
VSS
VREF - 90
mV
1
VIH.CA(AC160)
AC input logic high
VREF + 160
Note 2
mV
1,2,5
VIL.CA(AC160)
AC input logic low
Note 2
VREF - 160
mV
1,2,5
VIH.CA(AC135)
AC input logic high
VREF+135
Note 2
mV
1,2,5
VIL.CA(AC135)
AC input logic lowM
Note 2
VREF-135
mV
1,2,5
VREFCA(DC)
Reference Voltage for ADD, CMD inputs
0.49*VDD
0.51*VDD
V
3,4
NOTE :
1. For input only pins except RESET, VREF = VREFCA(DC)
2. See "Overshoot and Undershoot specifications" section.
3. The ac peak noise on VRef may not allow VRef to deviate from VRefDQ(DC) by more than +/-1% VDD (for reference: approx. +/- 13.5 mV).
4. For reference: approx. VDD/2 +/- 13.5 mV
5. These levels apply for 1.35 Volt operation only. If the device is operated at 1.5 V , the respective levels in JESD79-3 (VIH/L.CA(DC100), VIH/L.CA(AC175), VIHL.CA(AC150),
VIH/L.CA(AC135), VIH/L.CA(AC125)etc.) apply. The 1.5 V levels (VIH/L.CA(DC100), VIH/L.CA(AC175), VIH/L.CA(AC150), VIH/L.CA(AC135), VIHL.CA(AC125)etc.) do not
apply when the device is operated in the 1.35 voltage range.
[ Table 8 ] Single-ended AC & DC input levels for Command and Address(1.5V)
Symbol
Parameter
DDR3-800/1066/1333/1600
Min.
Max.
Unit
NOTE
1.5V
VIH.CA(DC100)
VIL.CA(DC100)
VIH.CA(AC175)
VIL.CA(AC175)
VIH.CA(AC150)
VIL.CA(AC150)
VREFCA(DC)
DC input logic high
DC input logic low
AC input logic high
AC input logic low
AC input logic high
AC input logic low
Reference Voltage for ADD, CMD inputs
VREF + 100
VSS
VREF + 175
Note 2
VREF+150
Note 2
0.49*VDD
VDD
VREF - 100
Note 2
VREF - 175
Note 2
VREF-150
0.51*VDD
mV
1,5
mV
1,6
mV
1,2,7
mV
1,2,8
mV
1,2,7
mV
1,2,8
V
3,4,9
NOTE :
1. For input only pins except RESET, VREF = VREFCA(DC)
2. See "Overshoot and Undershoot specifications" section.
3. The ac peak noise on VRef may not allow VRef to deviate from VRefCA(DC) by more than +/-1% VDD (for reference: approx. +/- 15 mV).
4. For reference: approx. VDD/2 +/- 15 mV.
5. VIH(dc) is used as a simplified symbol for VIH.CA(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.CA(DC100)
7. VIH(ac) is used as a simplified symbol for VIH.CA(AC175), VIH.CA(AC150), VIH.CA(AC135), and VIH.CA(AC125); VIH.CA(AC175) value is used when Vref + 0.175V is
referenced, VIH.CA(AC150) value is used when Vref + 0.150V is referenced, VIH.CA(AC135) value is used when Vref + 0.135V is referenced, and VIH.CA(AC125) value is
used when Vref + 0.125V is referenced.
8. VIL(ac) is used as a simplified symbol for VIL.CA(AC175), VIL.CA(AC150), VIL.CA(AC135) and VIL.CA(AC125); VIL.CA(AC175) value is used when Vref - 0.175V is
referenced, VIL.CA(AC150) value is used when Vref - 0.150V is referenced, VIL.CA(AC135) value is used when Vref - 0.135V is referenced, and VIL.CA(AC125) value is
used when Vref - 0.125V is referenced.
9. VrefCA(DC) is measured relative to VDD at the same point in time on the same device
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